rtc: alarm: Add in-kernel alarm interface

Drivers can now create alarms that will use an hrtimer while the
system is running and the rtc to wake up from suspend.

Signed-off-by: Arve Hjønnevåg <arve@android.com>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index cc0f9b1..27c3774 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -113,9 +113,17 @@
 	help
 	  Provides non-wakeup and rtc backed wakeup alarms based on rtc or
 	  elapsed realtime, and a non-wakeup alarm on the monotonic clock.
-	  Also provides an ioctl to set the wall time which must be used
+	  Also provides an interface to set the wall time which must be used
 	  for elapsed realtime to work.
 
+config RTC_INTF_ALARM_DEV
+	bool "Android alarm device"
+	depends on RTC_INTF_ALARM
+	default y
+	help
+	  Exports the alarm interface to user-space.
+
+
 config RTC_DRV_TEST
 	tristate "Test driver/device"
 	help